A long line carrying a uniform linear charge density +56.0 µC/m runs parallel to and 10 cm from the surface of a large, flat plastic sheet that has a uniform surface charge density of -102 µC/m2 on one side. Find the location of all points on a line perpendicular to the sheet and the charged line where an ? particle would feel no force due to this arrangement of charged objects.
cm from the line (in either direction)